Arthur h



A. H. HEDLY.

METHOD OF MAKING TYPOGRAPH MATRICES.

APPLICATION FILED AUGJS. 191T.

Patented July 1, 1919 WE? m K 6 Y w EVVEYQ 1 UNITED STATES PATENT ru nARTHUR H. HEDLY, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE LUDLOW TYPOGRAPEECOMPANY, OF CLEVELAND, OHIO, A CORPORATION OF MAINE.

METHOD FOR MAKING TYPOGRAPH MATRICES.

Specification of Letters Patent.

Original application filed. August 21, 1914, Serial No. 857,868. 7Divided and. this application filed August 13.

To all whom it may concern Be it known that I, ARTHUR H. HEDLY,a-citizen of the United States, and a resident of Chicago, county ofCook, and State of Illinois, have invented a new and useful Improvementin Methods for Making Typograph-Matrices, of which the following is aspecification, the principle of the invention being herein explained andthe best mode in. which I have contemplated applying .that principle, soas to distinguish it from other inventions.

-The present improvements relate, as indi cated, to the manufacture ofmatrices for typographs, and comprise more especially certain featuresof improvement disclosed in my copending application, filed August 21,1914, Serial No. 857,868, (since issued into Patent No. 1,237,643, datedAugust 21,1917), for manufacture of matrices'for typographs,

of which the present application is a div1'-' sion. These features referprimarily to the method of gaging the depth of the strike Where suchcharacter-impressions are forme with the use of a punch. p

To the accomplishment of the foregoing and related ends, the invention,then, consists of the steps hereinafter fully described and particularlypointed out in the claim, the annexed drawing and the followindescription setting forth in detail one mode of carrying out theinvention, such disclosed mode illustrating, however, but one of variousways in which the principle of the inventionmay be used. i

In said annexed drawing Figure 1 is a vertical sectional View of thebed' of a driving press or punching machine adapted for the manufactureof matrices in accordance with my improved method; Fig. 2 is aperspective view of a blank matrixbar or plate; Fig. 3 is a similarperspective View of such bar after it has been punched; Fig. 1 isaperspective view ofthe punch; and Fig. 5 is a side elevation of apunched bar or late showing the method of gaging the stri e of thepunch.

The only portions of the general mechanism that require to be described,or even referred to, in the present connection are the bed 1 and punchhead 7, these parts being -rela'tively reciprocablesoas t0 alternatelyadvance and retract the punch B with respect to the matrix bar or plateA, shown as 1917. Serial No. 185,857.

held in operative position on the bed 1. The details of the mechanismwhereby successive bars A may be brought in position for punching, andthere held in the man nor Illustrated in the figure in question. form nopart of the present invention. The same is true of the details ofconstruction of th head 7 whereby the punch B is adjustablv supported tovary the depth of the strike as well as to properly locate it withrespect to the matrix bar or plate A. A

The general form of the punch B eluploved .1n drivingcharacter-impressions into the blank matrix bars is indicated in Fig. 1but shown in more detail in Fig. 1. From tlu' fsb figures it will benoted that the lower end K of the punch is formed to enter the recess (1in the opposed edge of the matrix bar (see Fig. 2), such recess being acharacteristic feature of the particular bars in hand. and

it being understood that the face ofthe punch may be changed in form tosuit the rind of matrix bar. 1

There will, of course, be a different punch for each character, and thebody of such punch will correspond in its cross-sectional 1' dimensionswith those of the matrix, being just a trifle less, so that the punchmay more freely in the well or recess in the bottom of which the matrixblank is held gripped between the chuck jaws. As a matter of fact, asexplained before, it is the bed 10f the machine, with such chuck jawsand matrix blank, that are moved relatively to the punch, rather thanvice versa, the range of movement being slight, since it is onlynecessary to lower the blank sulliciently to allow the punch to clearthe recess a in such blank. and thus permit of the insertion of a secondblank after the character-impression has been struck in the first.

,Theupward movement of the bed of the machine carrying the blank, islimited by the engagement of the fiat upper faces of the chuck jaws witha plate (30 secured to the under side of the head 7, and forming part ofthe means whereby the punch is secured to such head. I y

In order to adjust the depth of the strike,

since the bed and the head thus occupy a fixed relation at the end ofthe punching stroke of the press, it is necessary to provide for thevertical''adpistment of the punch. The plate 60, 111st referred to,isaccordingly slidably held in ways 61 in a second plate 62 directlyattached tq the under side of the head, said ways inclining slightly tothe horizontal, as indicated in Fig. 1. The firstnamed plate 60 isprovided with an;undercut slot 63 adapted to receive and slidably holdblock 64 of T-shape, to which in turn is attached the punch B by meansofa screw 65 passing through the upper end of the same, and thedepending portion of such block 64. Obviously if the slidable plate 60be moved along its supporting ways 61 in the other plate, the punch andits supporting block being held against such movement by reason of theengagement of the former in the Well 17 between the chuck j aws, suchpunch will be slightly raised or lowered, depending upon the directionof movement of said plate 60.

Such movement is effected by means of a threaded spindle 66 rotatablybut longitudinally immovably held in a bracket 67 attached to the frontface of the head 7. The outer end of such spindle is provided with. ahand-wheel 68' to facilitate its rotation, while the threaded portionthereof engages with an upwardly projecting arm 69 on the plate. Bymeans of such screw and the slight angle of the ways, it willobviouslybe possible to secure a very fine adjustment of the punchvertically in the well, and thus obtain a strike of exactly the depthdesired in the production of any given character impression. Byproviding a micrometer scale (not shown) in connection with the wheel68, or other movable part associated with the adjustment of the punch,the correct position of. parts for any particular punch, onceascertained, can be readily returned to when the punch is used again,such correct position being empirically determined in the firstinstance. In other words, the character impression is struck in theblank matrix, and the depth of such impression is then carefully gagedby means of a suitable instrument, and the punch is thereupon adjusted,if necessary, until exactly the right depth has been obtained.

Although reference is thus made to the depth of the characterimpression, What I actually depend upon in manufacturing matrices withmypresent improved mechamsm, is the distance between the bottom of suchimpression and the back of the bar.

In other words, I have found that it is much more advantageous tomeasure the drive from the back of the bar instead of from its face.This distance a (Fig. 5) being preserved accurately, the distance Gbetween the front and back faces of the matrix bars may in turn bemeasured with reference to the same backs, and thus the as a minimumdistance between such faceand back is preserved in the original blank.The displacement moreover of the metal on the face adjacent theimpression due to the action of the punch becomes a matter ofindifference, since this is corrected in the final operation of trimmingthe face.

Other modes of applying the principle of my invention may be employedinstead of the one explained, change being made as regards the methodherein disclosed. provided the steps stated by the following claim orthe equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my inventionThe method of making matrices for typograph machines, and the like,which consists in driving a punch bearing a relief character into thematrix blank, gaging the depth of the strike with reference to the backof such blank, and then trimming the face thereof back to apredetermined distance from such back.

Sgned by me, this 9th day of August, 91

ARTHUR H. HEDLY.

